Home / 38,979.72-53,792.42-21,075.08

Finding the Fourth Proportional to 38,979.72, 53,792.42 and 21,075.08

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Solution

The fourth proportional to 38,979.72, 53,792.42 and 21,075.08 is: 29,083.82

Step by Step Solution

  1. Step 1: Write the proportion equation
    38,979.72 : 53,792.42 = 21,075.08 : x
  2. Step 2: Convert to fraction form
    38,979.72/53,792.42 = 21,075.08/x
  3. Step 3: Cross multiply
    38,979.72x = 53,792.42 × 21,075.08
  4. Step 4: Simplify right side
    38,979.72x = 1,133,679,180.56
  5. Step 5: Solve for x
    x = 1,133,679,180.56/38,979.72
  6. Step 6: Final answer
    x = 29,083.82

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.